var person = {
    name: "Van"
  }
  
  var anthorPerson = Object.create(person, {
    friends: {
      value: ["van", "louis", "nick"]
    }
  })
  var secondPerson = Object.create(person, {
    friends: {
      value: ["van", "louis", "nick"]
    }
  })
  console.log(secondPerson.friends.push('yongqi'))
  console.log(secondPerson.friends);
  console.log(anthorPerson.friends);
  